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Network modelling and power flow simulations Lessons learned. Konrad Purchala Tractebel Engineering. EWEC conference - TradeWind 18.3.2009, Marseille. Grid modeling. Objectives of the TradeWind study Investigate power flows across Europe Effect of moving weather conditions - PowerPoint PPT Presentation
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Konrad PurchalaTractebel Engineering
Network modelling and power flow
simulations Lessons learned
EWEC conference - TradeWind18.3.2009, Marseille
Grid modeling
Objectives of the TradeWind study• Investigate power flows across Europe• Effect of moving weather conditions• Identify main bottlenecks
Context• Europe is zonal markets• National networks developed to be cooper
plates• Main structural bottlenecks at national frontiers
Note: issue of network data availability
4000+ nodes
6000+ lines
UCTE grid – the modeling challenge
Aggregated interconnection model
Physical cross-border lines model
Physical cross-border lines
model+
Grid modeling
Dilemmas• Can we get the detailed model from the TSOs?• Robustness of the model?
– solving 8760 hourly snapshots, data processing
• Location of generation, wind farms, demand?• Temporal variations of the demand?• Budget?
The chosen approach• Public grid model• Only cross-border constraints• DC power flow• At the end of the project, grid model available from the
TSOs
Grid modeling (example of UCTE)
Grid representation UCTE
DC power flow
orPTDF-solution
Comparison UCTE vs TradeWind
Approx. UCTE Detailed UCTE
bus total 1381 4339
generator buses 568 943
load buses 984 2317
total branches 2211 7292
lines 2211 6201
transformers 0 1091
hvdc 12 12
Modeling issues
Transmission bottlenecks• Anticipated main bottlenecks
– Detailed task in the project – Cross-country analyses
• All relevant bottlenecks should be included– Surely cross-border– For some countries also internal lines
• Future network reinforcements• Modeling of wind farms
– Correlation with the wind speed data– Grid connection?
• Treatment of hydro power– Water reservoir levels
Main lessons learned
• TradeWind changed the scene for integration studies
– Breakthrough on data availability– UCTE research model now available– Fruitful collaboration with the TSOs
• Methodology and data for future integration studies– Hour-by-hour investigations covering multiple years– Huge database of wind speeds, conversion curves, wind
capacity expansion scenarios, etc
• Large scale market simulations with grid constraints
– Allowing for more realistic results
Questions?
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